Bendixen, P.H., Vilson, B. & Ekesbo, I. (1987). Disease frequencies in dairy cows in Sweden. II. Retained placenta. Preventive Veterinary Medicine, 4, 377-387.
Correa, M.T., Erb, H. & Scarlett, J. (1993). Path analysis of seven postpartum disorders of Holstein cows. Journal of Dairy Science, 76, 1305-1312.
Curtis, R.A. I. (1973). Prevention of retained fetal membranes in cattle. Veterinary Record, 92, 291.
Dubuc, J., Duffield, T.F., Leslie, K.E., Walton, J. S. & LeBlanc, S. J. (2010). Risk factors for postpartum uterine diseases in dairy cows. Journal of Dairy Science, 93, 5764-5771.
Emanuelson, U., Oltenacu, P.A. & Gröhn, Y.T. (1993). Nonlinear mixed model analyses of five production disorders of dairy cattle. Journal of Dairy Science, 76, 2765-2772.
Esslemont, R.J. & Kossaibati, M.A. (1996). Incidence of production diseases and other health problems in a group of dairy herds in England. Journal of Veterinary Record, 139, 486-490.
Fricke, P. & Wiltbank, M. (1999). Effect of milk production on the incidence of double ovulation in dairy cows. Theriogenology, 52, 1133-1143.
Gaafar, H.M.A., Shamiah, SH. M., Shitta, A. A. & Ganah, H. A. B. (2010). Factor affecting retention of placenta and its influence on postpartum reproductive performance and milk production in Friesian cows. Slovak Journal of Animal Science, 43(1), 6-12.
Goff, J.P. (2006) Major advances in our understanding of nutritional influences on bovine health. Journal of Dairy Science, 89, 1292-1301.
Gröhn, Y.T., Erb, H.N., McCulloch, C.E. & Saloniemi, H.S. (1990). Epidemiology of reproductive disorders in dairy cattle: associations among host characteristics, disease and production. Prevent Veterinary Medicine, 8, 25-39.
Han, I.K. & Kim, I.H. (2005). Risk factors for retained placenta and the effect of retained placenta on the occurrence of postpartum diseases and subsequent reproductive performance in dairy cows. Journal of veterinary Science, 6, 53-59.
Hur, T.Y., Jung, Y.H., Kang, S.J., Choe, C.Y., Kim, U.H., Ryu, Il-S., Son, DS., Park, S.J. & Kim, Ill-H. (2011). the impact of the duration of retained placenta on postpartum diseases and culling rates in dairy cows. Veterinary Research, 51(3), 233-237.
Joosten, I. J., Stelwagen, A. & Dijkhuizen, A. (1998). Economic and reproductive consequences of retained placenta in dairy cattle. Journal of Veterinary Record, 123, 53-57
Könyves, L., Szenci, O., Jurkovich, V., Tegzes, L., Tirián, A., Solymosi, N., Gyulay, G. & Brydl, E. (2009). Risk assessment and Consequences of Retained Placentafor Uterine Health, Reproduction and Milk Yield in Dairy Cows. Acta Veterinaria Brno, 78, 163-172.
Laven, R.A. & Peters, A.R. (1996). Bovine retained placenta: a etiology, pathogenesis and economic loss. Journal of Veterinary Record, 139, 465-471.
Mahnani, A., Sadeghi-Sefidmazgi, A. & Cabrera, V. E. (2015). Consequences and economics of metritis in Iranian Holstein dairy farms. Journal of Dairy Science, 98, xx-xx (In press).
Markusfeld, O. (1987). Periparturient traits in seven high dairy herds. Incidence rates, association with parity, and interrelationships among traits. Journal of Dairy Science, 70, 158-166.
Muller, L.D. & Owens, M.J. (1974). Factors associated with the incidence of retained placentas. Journal of Dairy Science, 57, 725-728.
Opsomer, G. & Kriuf, A.de. (2009). Metritis and endometritis in high yielding dairy cows.VlaamsDiergeneeskundig Tijdschrift, 78, 83-88.
Roberts, J.S. (1991). Veterinary obstetrics and genital diseases. (Theriogenology) 3rd Ed. pp. 96-285.
Thatcher, W.W., Bilby, T.R, Bartolome, J.A., Silvestre, F., Staples, C.R. & Santos, J.E. (2006). Strategies for improving fertilityin the modern dairy cow. Theriogenology, 65, 30-44.
Van Werven, T., Schukken, Y.H., Lloyd, J., Brand, A., Heeringa, H.T. & Shea, M. (1992). The effect of duration of retained placenta on reproduction, milk production, postpartum disease and culling rate. Theriogenlogy, 37, 1191-1203.